Radiator



i the surrounding air.

Patented Feb. 17, 1931 UNITED STATES PATENT: OFFICE THOMAS E. MURRAY, JR, OF BROOKLYN, YOBIQASSIGNOR TO MURRAY RADIATOR CORPORATION, A CORPORATION 01 NEW YORK RADIATOR Application filed March 11, ieaafsem No. 345,985.

The invention aims to provide certain improvements in' radiators and similar apparatus which facilitates production and makes a better radiator.

The invention is particularly designed as an improvement upon the type of radiator shown in my previous application 310,959 filed October 8, 1928.

The accompanying drawings illustrate an embodiment of the invention. 1

Figs. 1 and 2 are respectively a plan and a side elevation of a radiator;

Fig. 3 is a horizontal section and Fig. 4 a vertical section illustrating one of the joints;

Fig. 5 is a perspective view-of part of one of the corrugated sheets.

The heating element is a tube 1 for conveying steam or other heating medium, preferably made of thin copper for high conductivity. Applied to one or, preferably, to both of the opposite sides of the pipe are extended area structures, preferably also of thin sheet copper, corrugated in the manner shown. The extended area structure at each side may be made of a single sheet extending the length of the radiator or of two or more sections making up the total length. Apparatus of this sort can be used not only as ordinary radiators for heating the air of a room, but also forv cooling the air by passing a cooling medium through the tube and for heat interchangers in other arts.

It is desirable to make the corrugated sheets of considerable extent so as to provide an extended area for transmitting the heat to It is also desirable to limit the width of the radiator so as to economize space required for its installation.

I accomplish these purposes by the special formation of the corrugated sheets. Each sheet is bent to provide the longitudinally extending portions 2 between which are major corrugations formed by transverse plates 3, Thus we have vertical flues or passages which are alternately closed at the outside and open at the outside which cause a strong induced draft of the heated air so that it not only absorbs heat but is carried upward at an accelerating speed and circulated with comparative rapidity throughoutthe room to be heated.

Each of the major corrugations referred to is rovided with a deep groove in its outer wa l, the sides 4 of which extend to or nearly to the tube 1 and thus divide the space into two smaller vertical flues which are closed at the outside and one of which is open. Instead of a single inward groove two or more such grooves maybe formed in the major corrugation between each pair of longitudinal plates 2, and the shapes of such grooves in cross-section may be varied from that shown. By this arrangement the cross-section of the extended area surface is divided into a number of comparatively small pas sages between each pair of longitudinal plates 2 or points of attachment to the tube.

The attachment of the corrugated plates to the tube may be effected in various ways. In the case illustrated, the longitudinal plates 2' are pressed out to form recessed portions 5 which embrace the pipe 1 and are preferably deep enough to bring the opposite plates 2 together as shown in Fig. 4.

Also the plates are punched with openings 6 which will lie immediately above and below the pipe. In Fig. 5 the plates 4 forming the secondary corrugations are shown of less widthcompared to the plates 3 than in Fig. 1; the proportion may be varied, but it will be understood that the best practice is to make the sheets of final shape before applying them to the pipe.

The plates 2 are clamped together about the pipe by means of straps having end portions 7 and recessed portions 8 which embrace the recessed portions 5 of the corrugated sheets. The opposite straps 7 are then united ,by welds 9 passing through the openings in the sheets 2.

The space between two of the fins or transverse plates 3 at opposite edges of a longitudinal plate 2 is left open sufficiently for the easy insertion of the welding tools, and

the plates 2 are broad enough to secure a' fair- 1y wide contact with the pipe and to permit t e making of a strong joint. Efliciency in operation of the radiator is secured by providing numerous transverse plates 3 and 4 close together and by providing a plurality ness of the structure compared with a smaller number of wider corrugations.

Altho I have specifically mentioned copper any of the common metals may be employed for either the tube or the sheets.-

Among such metals are aluminum, brass, zinc, iron or steel, etc. 1

Various modifications ma be made by those skilled in the art wit out departing from the invention as defined in thefollowing claims:

1. A radiator including in combination a heating element and an extended area strncture united thereto consisting of thin sheet metal having in horizontal section major corrugations of which the inner portions are attached at intervals to the heating element and having a plurality of deep minor corrugations between the points of attachment to the heating element.

2. A radiator including in combination a heating element and an extended area structure united thereto consisting of thin sheet metal having in horizontal section major corrugations of which the inner portions are attached at intervals to the heating element tions each extending inwardly substanti y or approximately to the side of the heating element.

3. A radiator including in combination a heating element and an extended area structure united thereto consisting of thin sheet metal having in horizontal section major corrugations which form inner longitudinal plates engaging the heating element, transverse plates extending outward from theedges of each longitudinal late with a space between them equal in wi th at least to the width of the inner, longitudinal plate, and outer portions with a plurality of deep corrugations between successive longitudinal plates.

4. A radiator including in combination a heating element and an extended area structure united thereto consisting of a thin metal sheet corrugated in horizontal section to provide longitudinal plates engaging the heating element, transverse plates extending outwardly from the ed es of each longitudinal plate witha space etween them equal in width at least to thewidth ofthelongitudinal plate, and with a rgiurality of corrugations extending inwa y substantially or approximately to the side of the heatin element between successive longitudinal p ates.

5. A radiator including in combination a long narrow horizontal heating element and an extended area structure united thereto consisting of thin sheet metal having in horizontal section major corrugations of which the inner portions are recessed to embrace the heating element and provide a heat conducting path of large area, and having also a plurahty of dee minor corrugtionsbetween the points 0 application to the heating element.

.m witness whereof,I have hereunto signed my name.

4 THOMAS E. MURRAY, JR.

and having a plurality of minor corru a- 

